Electric field & Electromagnetic force on PCBs with bare copper tracks

Printed Circuit Boards (PCBs) are usually made of paper and glass fiber with bare copper tracks with a thin coating of solder mask all over which can’t be shielded up, are largely employed for building power supply, solid state systems, and they're real compact with parts indeed. That's why any system built with this method tends to have higher interference impact to all bare copper tracks caused by electric field and electromagnetic force, which badly distorts the sound and image quality of any system as flow of electrons, occurs whenever you turn on your system. And for one thing, processes of producing PCBs are not good for the environment as well.

Any systems made with bare copper tracks or wires won’t sound good at all. You may also refer to the article at the link below:

http://en.wikipedia.org/wiki/Electromagnetic_interference

As for CD/DVD player and D/A converter, making with PCBs, are just fairly acceptable as the working power is real low. If PCBs are employed with most electronic components, such as solid state pre-amp and power amp, the sound quality of this is totally unacceptable when compared with glass tube system with hard wire circuit. That’s the main reason why solid state amplifiers don’t sound as good at all.

That's the reason why most modern glass tube systems built with bare copper track PCBs never sound as good as the traditional glass tube systems built with hard wires, not to mention any solid state systems.

Of course you can also shield up every piece of PCB, every part or component of it shall apply appropriate insulated metallic partitions and shield up every inch of cable as you think fit in order to improve the sound and video quality. I have never found any system with shielded PCBs. In my case, I do shield up all the PCBs as can be.

Lately, there’s a new kind of PCB with aluminum or metal base, this is a kind of real good board, which can shield up electric field and dissipate a certain heat of any electronic system. PCB made this way is much better than any traditional PCBs with insulated synthetic glass fiber or paper. Unfortunately, there’s no systems made with this kind of aluminum based printed circuit board.

Actually aluminum is a good material; you may take a look at the links below:

http://www.alufuture.org/affg/pop/propretie.htm

You may visit the site below for aluminum based PCBs:

http://www.kingfordpcb.com/products/?Action=list&yy=0